Vigoreaux J O
Department of Zoology, University of Vermont, Burlington 05405.
J Muscle Res Cell Motil. 1994 Jun;15(3):237-55. doi: 10.1007/BF00123477.
Two of the most characteristic features of striated muscle are (i) its ability to contract and generate tension when activated and (ii) its ability to return to its original length and form after contraction or stretching ceases. These two properties are to a large extent the primary manifestations of separate sets of filament systems: contractile actin and myosin filaments and viscoelastic titin and intermediate filaments. Z bands function as a common link that mechanically integrates contractile and elastic elements and as such they play a fundamental role in transmission of active and passive forces. Differences in Z band structure have been described for distinct classes of muscle and fibre types. The diversity in Z band architecture has been built around its phylogenetically conserved role as an actin-anchoring structure. Novel proteins are likely to account for structural and functional differences seen across the phyla.
（i）激活时能够收缩并产生张力；（ii）收缩或拉伸停止后能够恢复到原始长度和形态。这两个特性在很大程度上是不同细丝系统的主要表现：收缩性肌动蛋白和肌球蛋白细丝以及粘弹性肌联蛋白和中间细丝。Z带作为一个共同的连接结构，机械地整合收缩和弹性元件，因此它们在主动力和被动力的传递中起着基本作用。不同类型的肌肉和纤维类型的Z带结构存在差异。Z带结构的多样性是围绕其作为肌动蛋白锚定结构的系统发育保守作用构建的。新的蛋白质可能是造成不同门类间结构和功能差异的原因。
